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Manganese zinc ferrite burn-back method

A technology of manganese zinc ferrite and oxygen content is applied in the field of sintering of manganese zinc ferrite materials to achieve the effects of recycling, saving costs and reducing waste

Active Publication Date: 2015-01-28
JIANGSUSR MAGNETIC MATERIAL & DEVICE ENG TECH RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the existing problem of recycling and reusing defective manganese zinc ferrite produced by sintering due to lack of oxygen, and to provide a method for back-burning manganese-zinc ferrite so that the power of the defective product after back-burning The loss meets the requirements of use

Method used

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Embodiment Construction

[0012] The present invention is described in further detail below in conjunction with embodiment.

[0013] The invention uses defective manganese zinc ferrite produced by sintering due to lack of oxygen as raw materials, and improves the power loss performance of such defective products by backburning to meet the use requirements. If the defective product is refired according to the sintering conditions of the normal product, although the performance can be restored, the color of the surface will be seriously deteriorated.

[0014] The burnback process is as follows:

[0015] 1. Send the manganese zinc ferrite into the bell furnace, and raise it from normal temperature to 800°C at a speed of 3.57°C / min. During this process, the atmosphere in the furnace is air;

[0016] 2. Then, it is raised from 800°C to 1250°C at a rate of 3°C / min. During the heating process, the oxygen content in the atmosphere decreases linearly to 0;

[0017] 3. After the temperature rises to 1250°C, st...

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PUM

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Abstract

The invention discloses a manganese zinc ferrite burn-back method which comprises the following steps: (1) raising the temperature of manganese zinc ferrite from room temperature to 800 DEG C under air atmosphere; (2) heating the temperature of manganese zinc ferrite from form 800 DEG C to 1250 DEG C, wherein the content of oxygen in air atmosphere is reduced to below 1.5%; and (3) after carrying out heat preservation on manganese zinc ferrite for 50-70 minutes at 1250 DEG C and cooling at a speed of 2.5-3 DEG C / minute. Inferior-quality products generated by anoxic sintering are treated by the burn-back method have performances which are as the same as that of a normal product, the surface color is as the same as that of the normal product, and the size of the product is not affected after burn-back, so that the problem of recycling inferior-quality products can be solved, thereby reducing the waste and lowering the cost.

Description

technical field [0001] The invention relates to the sintering technology of manganese-zinc ferrite materials, in particular, it relates to a manganese-zinc ferrite sintered under oxygen-deficiency sintering to improve the performance of the product through back-burning, so as to achieve the required performance of the magnetic material. Background technique [0002] Under normal sintering conditions, manganese zinc ferrite can achieve the superior performance of its material, but under abnormal conditions, its performance will deteriorate. There are two abnormal conditions, one: multi-oxygen sintering, the surface of the product in this sintering state has a different color from the normal product, and it is easy to distinguish it from the normal product by color. Two: Anoxic sintering, in this sintering state, the surface of the product is the same color as the normal product, but the power loss of the product has seriously deteriorated, and it is difficult to distinguish i...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/64
Inventor 赵新江
Owner JIANGSUSR MAGNETIC MATERIAL & DEVICE ENG TECH RES